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Comparing gvpe/src/device.h (file contents):
Revision 1.18 by pcg, Fri Mar 18 01:53:05 2005 UTC vs.
Revision 1.26 by root, Wed Jul 17 16:40:57 2013 UTC

1/* 1/*
2 device.h -- generic header for device.c 2 device.h -- generic header for device.c
3 Copyright (C) 2003-2005 Marc Lehmann <gvpe@schmorp.de> 3 Copyright (C) 2003-2008 Marc Lehmann <gvpe@schmorp.de>
4 4
5 This file is part of GVPE. 5 This file is part of GVPE.
6 6
7 GVPE is free software; you can redistribute it and/or modify 7 GVPE is free software; you can redistribute it and/or modify it
8 it under the terms of the GNU General Public License as published by 8 under the terms of the GNU General Public License as published by the
9 the Free Software Foundation; either version 2 of the License, or 9 Free Software Foundation; either version 3 of the License, or (at your
10 (at your option) any later version. 10 option) any later version.
11 11
12 This program is distributed in the hope that it will be useful, 12 This program is distributed in the hope that it will be useful, but
13 but WITHOUT ANY WARRANTY; without even the implied warranty of 13 WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
15 GNU General Public License for more details. 15 Public License for more details.
16 16
17 You should have received a copy of the GNU General Public License 17 You should have received a copy of the GNU General Public License along
18 along with gvpe; if not, write to the Free Software 18 with this program; if not, see <http://www.gnu.org/licenses/>.
19 Foundation, Inc. 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 19
20 Additional permission under GNU GPL version 3 section 7
21
22 If you modify this Program, or any covered work, by linking or
23 combining it with the OpenSSL project's OpenSSL library (or a modified
24 version of that library), containing parts covered by the terms of the
25 OpenSSL or SSLeay licenses, the licensors of this Program grant you
26 additional permission to convey the resulting work. Corresponding
27 Source for a non-source form of such a combination shall include the
28 source code for the parts of OpenSSL used as well as that of the
29 covered work.
20*/ 30*/
21 31
22#ifndef GVPE_DEVICE_H__ 32#ifndef GVPE_DEVICE_H__
23#define GVPE_DEVICE_H__ 33#define GVPE_DEVICE_H__
24 34
… …
27#define IFNAMESIZE 256 // be conservative 37#define IFNAMESIZE 256 // be conservative
28 38
29#include "global.h" 39#include "global.h"
30#include "util.h" 40#include "util.h"
31 41
32struct net_packet { 42struct net_packet
43{
33 u32 len; // actually u16, but padding... 44 u32 len; // actually u16, but padding...
45 // upto 4 bytes at the end might get overwritten when decrypting,
46 // which means len, above, is regularly overwritten with part
47 // of the random prefix when RAND_BYTES=12.
34 48
35 u8 &operator[] (u16 offset) const; 49 u8 &operator[] (u16 offset) const;
36 u8 *at (u16 offset) const; 50 u8 *at (u16 offset) const;
37 51
38 void unshift_hdr (u16 hdrsize) 52 void unshift_hdr (u16 hdrsize)
… …
43 57
44 void skip_hdr (u16 hdrsize) 58 void skip_hdr (u16 hdrsize)
45 { 59 {
46 len -= hdrsize; 60 len -= hdrsize;
47 memmove ((void *)&(*this)[0], (void *)&(*this)[hdrsize], len); 61 memmove ((void *)&(*this)[0], (void *)&(*this)[hdrsize], len);
62 }
63
64 u16 ipv4_hdr_len () const
65 {
66 return ((*this)[0] & 15) << 2;
48 } 67 }
49 68
50 void set (const net_packet &pkt) 69 void set (const net_packet &pkt)
51 { 70 {
52 len = pkt.len; 71 len = pkt.len;
… …
79 98
80 void *operator new (size_t s); 99 void *operator new (size_t s);
81 void operator delete (void *p); 100 void operator delete (void *p);
82}; 101};
83 102
84struct data_packet : net_packet { 103struct data_packet : net_packet
104{
85 u8 data_[MAXSIZE]; 105 u8 data_[MAXSIZE];
86}; 106};
87 107
88inline 108inline
89u8 &net_packet::operator[] (u16 offset) const 109u8 &net_packet::operator[] (u16 offset) const
90{ 110{
91 return ((data_packet *)this)->data_[offset]; 111 return ((data_packet *)this)->data_[offset];
92} 112}
93 113
94inline 114inline
95u8 *net_packet::at (u16 offset) const 115u8 *net_packet::at (u16 offset) const
96{ 116{
97 return &((*this)[offset]); 117 return &((*this)[offset]);
98} 118}
99 119
100struct tap_packet : net_packet { 120struct tap_packet : net_packet
121{
101 mac dst; 122 mac dst;
102 mac src; 123 mac src;
103 u8 data[MAXSIZE - 12]; 124 u8 data[MAXSIZE - 12];
104}; 125};
105 126
106struct tap_device { 127struct tap_device
128{
107 int fd; 129 int fd;
108 130
109 // network interface name or identifier 131 // network interface name or identifier
110 char ifrname[IFNAMESIZE + 1]; 132 char ifrname[IFNAMESIZE + 1];
111 133
… …
117 //bool open (); 139 //bool open ();
118 //void close (); 140 //void close ();
119 141
120 const char *interface () { return ifrname; } 142 const char *interface () { return ifrname; }
121 const char *info (); 143 const char *info ();
144 const char *if_up ();
122 145
123 tap_packet *recv (); 146 tap_packet *recv ();
124 void send (tap_packet *pkt); 147 void send (tap_packet *pkt);
125}; 148};
126 149

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